卤素离子对NELIBS信号的影响研究  

Influence of halogen ions on NELIBS

作　　者：孙亚楼 吴柯岩 李智凡 沈洁[3] 王健 SUN Yalou;WU Keyan;LI Zhifan;SHEN Jie;WANG Jian(The 404 Company Limited,China National Nuclear Corporation,Jiayuguan 735100,China;Key Laboratory of Nuclear Fuel Cycle Technology,Gansu Province,Jiayuguan 735100,China;School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]中核四○四有限公司,嘉峪关735100 [2]甘肃省核燃料循环技术重点实验室,嘉峪关735100 [3]兰州大学核科学与技术学院,兰州730000

出　　处：《激光技术》2024年第3期411-415,共5页Laser Technology

基　　金：××科技创新特区基金资助项目(18-163-00-TS-004-153-01)。

摘　　要：为了提高激光诱导击穿光谱(LIBS)的检测灵敏度,研究了不同种类、不同浓度的卤素离子对LIBS信号增强程度的影响。根据实验条件和吸收光谱信息筛选合适尺寸的银纳米颗粒,两亲性分子十二烷基硫酸钠(SDS)提供粘性力,硅片作为基底,引入卤素离子与纳米银溶胶反应诱导纳米颗粒发生聚集。结果表明,卤素阴离子可以有效地诱导纳米银颗粒聚集,且卤素阴离子的加入可以显著增强目标元素MgⅠ382.9 nm,383.2nm和383.8 nm的LIBS信号,Mg的检测限提升到μg/L量级;不同种类卤素离子对纳米颗粒增强LIBS(NELIBS)信号增强的作用,即F->Cl->Br->I-。此结果说明卤素阴离子诱导的纳米颗粒团聚现象可以有效增强LIBS信号强度,能够实现液体中元素Mg的检测分析,满足现代分析技术的新要求。In order to enhance the detection sensitivity of laser-induced breakdown spectroscopy(LIBS),the effects of different kinds of halogen ions with different concentrations on the LIBS signal enhancement were studied.Suitable-sized silver nanoparticles were selected based on experimental conditions and absorption spectrum information.The amphiphilic molecule sodium dodecyl sulfate(SDS)provided the necessary viscous force,while halogen ions were introduced into silicon wafers as substrates to induce aggregation of the silver sol nanoparticles.The results show that halide ions induce nanoparticle aggregation and enhance LIBS emission intensities of MgⅠlines at the wavelengths 382.9 nm,383.2 nm and 383.8 nm.The limit of detection of Mg has been improved toμg/L.Effects of different halogen ions on nanoparticle enhanced LIBS(NELIBS)signal enhancement:F->Cl->Br->I-.The achievements of this study demonstrate that halide ions induced nanoparticle aggregation enhanced NELIBS signal and can realize the element detection and analysis of Mg in liquid,which meets new requirements of modern analysis technology.

关 键 词：光谱学 激光诱导击穿光谱 纳米颗粒 卤素阴离子 

分 类 号：TG146.453[一般工业技术—材料科学与工程] O657.38[金属学及工艺—金属材料]